linux-kernel - [PATCH 3/4] USB: gadget: f_fs: add SuperSpeed Plus support

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Date:   Thu, 26 Nov 2020 19:02:34 +0100
From:   Greg Kroah-Hartman <gregkh@...gle.com>
To:     balbi@...nel.org
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        "taehyun.cho" <taehyun.cho@...sung.com>,
        Peter Chen <peter.chen@....com>,
        stable <stable@...r.kernel.org>,
        Will McVicker <willmcvicker@...gle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 3/4] USB: gadget: f_fs: add SuperSpeed Plus support

From: "taehyun.cho" <taehyun.cho@...sung.com>

Setup the descriptors for SuperSpeed Plus for f_fs. This allows the
gadget to work properly without crashing at SuperSpeed rates.

Cc: Felipe Balbi <balbi@...nel.org>
Cc: Peter Chen <peter.chen@....com>
Cc: stable <stable@...r.kernel.org>
Signed-off-by: taehyun.cho <taehyun.cho@...sung.com>
Signed-off-by: Will McVicker <willmcvicker@...gle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/usb/gadget/function/f_fs.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 046f770a76da..a34a7c96a1ab 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -1327,6 +1327,7 @@ static long ffs_epfile_ioctl(struct file *file, unsigned code,
 		struct usb_endpoint_descriptor *desc;
 
 		switch (epfile->ffs->gadget->speed) {
+		case USB_SPEED_SUPER_PLUS:
 		case USB_SPEED_SUPER:
 			desc_idx = 2;
 			break;
@@ -3222,6 +3223,10 @@ static int _ffs_func_bind(struct usb_configuration *c,
 	func->function.os_desc_n =
 		c->cdev->use_os_string ? ffs->interfaces_count : 0;
 
+	if (likely(super)) {
+		func->function.ssp_descriptors =
+			usb_copy_descriptors(func->function.ss_descriptors);
+	}
 	/* And we're done */
 	ffs_event_add(ffs, FUNCTIONFS_BIND);
 	return 0;
-- 
2.29.2